SERVICE LOAD TEST OF 1:3 SCALE SHELL BRIDGE MODEL

Several factors--lack of maintenance, increase in legal loads, and increased traffic volumes--have rendered thousands of bridges deficient in the surface transportation system. One potential solution to replacement or rehabilitation is the shell bridge. This system consists of integrated shell-deck concrete segments that are posttensioned together to form a bridge. To determine its behavior when subjected to various load patterns, a 1:3 shell-bridge model was fabricated and service-load tested. Single concentrated loads and simulated American Association of State Highway and Transportation Officials (AASHTO) HS20-44 truck loads were applied to the model. The model was analyzed using the ANSYS finite element program. The buckling potential due to the posttensioning forces was also examined with ANSYS. Fabrication and construction of the 1:3 model confirmed the feasibility of constructing segmental shell bridges. The integrated shell-deck section displayed high stiffness and yet is lighter than conventional systems.

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  • English

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Filing Info

  • Accession Number: 00716525
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 25 1996 12:00AM